[PATCH] R600: Disable FP exceptions

[Tom Stellard]

On Sat, Aug 09, 2014 at 01:07:45AM +0000, Matt Arsenault wrote:
> http://reviews.llvm.org/D4834

LGTM.

> 
> Files:
>   lib/Target/R600/AMDGPUISelLowering.cpp
> 
> Index: lib/Target/R600/AMDGPUISelLowering.cpp
> ===================================================================
> --- lib/Target/R600/AMDGPUISelLowering.cpp
> +++ lib/Target/R600/AMDGPUISelLowering.cpp
> @@ -376,6 +376,11 @@
>    setSchedulingPreference(Sched::RegPressure);
>    setJumpIsExpensive(true);
>  
> +  // SI at least has hardware support for floating point exceptions, but no way
> +  // of using or handling them is implemented. They are also optional in OpenCL
> +  // (Section 7.3)
> +  setHasFloatingPointExceptions(false);
> +
>    setSelectIsExpensive(false);
>    PredictableSelectIsExpensive = false;

> Index: lib/Target/R600/AMDGPUISelLowering.cpp
> ===================================================================
> --- lib/Target/R600/AMDGPUISelLowering.cpp
> +++ lib/Target/R600/AMDGPUISelLowering.cpp
> @@ -376,6 +376,11 @@
>    setSchedulingPreference(Sched::RegPressure);
>    setJumpIsExpensive(true);
>  
> +  // SI at least has hardware support for floating point exceptions, but no way
> +  // of using or handling them is implemented. They are also optional in OpenCL
> +  // (Section 7.3)
> +  setHasFloatingPointExceptions(false);
> +
>    setSelectIsExpensive(false);
>    PredictableSelectIsExpensive = false;
>  

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